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Speer uses Uni-Cor technology to take full metal jacket bullets to their highest level of evolution. Speer completely encases the lead core in a seamless jacket to prevent deformation under pressure, increase accuracy, and reduce barrel fouling. Speer swages each bullet twice, ensuring consistent diameters and a uniform heel. TMJ bullets are great for casual practice and plinking because, in addition to being super-accurate, they're also economical.